철저하다 Korean adjective conjugation
to be thorough, exhaustive
Every form of 철저하다 across the four speech levels. It is 여 irregular — 하다 and every verb built on it: 하다 → 하여 → 해요.
기본형Principal parts
The four forms the dictionary prints. Every other form on this page is derived from them.
- 관형사형Modifier
- 철저한
- 아/어Infinitive
- 철저해
- -으니Since
- 철저하니
- 합니다Formal
- 철저합니다
현재Present
The tense that does the most work. 해요체 is the one to learn first — it is polite without being formal, and it is what most conversation is in.
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 철저해요 | 철저합니다 | 철저해 | 철저하다 |
과거Past
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 서술Statement | 철저했어요 | 철저했습니다 | 철저했어 | 철저했다 |
미래·추측Future & presumptive
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| -겠-Will / must be | 철저하겠어요 | 철저하겠습니다 | 철저하겠어 | 철저하겠다 |
| -을 것이다Going to | 철저할 거예요 | 철저할 것입니다 | 철저할 거야 | 철저할 것이다 |
의문Questions
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 철저해요? | 철저합니까? | 철저해? | 철저하니? |
| 과거Past | 철저했어요? | 철저했습니까? | 철저했어? | 철저했니? |
부정Negation
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 안Not (short) | 안 철저해요 | 안 철저합니다 | 안 철저해 | 안 철저하다 |
| -지 않다Not (long) | 철저하지 않아요 | 철저하지 않습니다 | 철저하지 않아 | 철저하지 않다 |
높임Honorific
| 해요체Polite | 합니다체Formal | 해체Casual | 한다체Plain | |
|---|---|---|---|---|
| 현재Present | 철저하세요 | 철저하십니다 | 철저하셔 | 철저하시다 |
| 과거Past | 철저하셨어요 | 철저하셨습니다 | 철저하셨어 | 철저하셨다 |
관형사형Modifying a noun
- 현재Present
- 철저한
- 과거Past
- 철저한
- 미래Future
- 철저할
- 회상Used to
- 철저하던
연결Joining clauses
- -고and
- 철저하고
- -게-ly / so that
- 철저하게
- -어서so / and then
- 철저해서
- -으니까since
- 철저하니까
- -으면if / when
- 철저하면
- -지만but
- 철저하지만
- -는데and / but (setting up)
- 철저한데
- -어도even if
- 철저해도
문형Sentence patterns
How the dictionary says this verb is used. The numbers are slots: 1 is the subject, 2 the object.
- 1이 2에 철저하다
예문In real sentences
From the dictionary, each with its translation.
돈 관리에 철저하셨죠.
She was a good money manager.
그만큼 철저하다는 거겠지
That's good. It means they're being thorough.
제가 아주 철저한 검사를 할 수 있었던 것입니다
I could do an extraordinarily thorough exam.
데카르트와 스피노자와는 달리, 라이프니츠는 대학에서 철저한 철학 교육을 받았다.
Unlike Descartes and Spinoza, Leibniz had a thorough university education in philosophy.
자주 묻는 질문Common questions
How do you conjugate 철저하다 in Korean?
철저하다 (to be thorough, exhaustive) is 철저해요 in the polite 해요체, 철저합니다 in formal 합니다체, 철저해 in casual 반말 and 철저하다 in the plain written style. The past is 철저했어요.
What is the past tense of 철저하다?
철저했어요 in everyday polite speech, 철저했습니다 formally. It is built from the 아/어 form 철저하여 plus ㅆ, which is why an irregular stem shows its irregularity here.
Is 철저하다 irregular?
Yes — it is 여 irregular (여 불규칙). 하다 and every verb built on it: 하다 → 하여 → 해요. That is why the stem looks different in 철저하여 and 철저하니 but unchanged in 철저합니다.
What TOPIK level is 철저하다?
5급 — TOPIK 5, advanced.
Dictionary form, meaning, sentence patterns, examples and audio from the 국립국어원 한국어기초사전, used under CC BY-SA 2.0 KR.
Conjugations are generated by this site's own engine and checked against the 9,380 forms the dictionary publishes on every build.